diff --git a/nix/modules/dhcp.nix b/nix/modules/dhcp.nix
index 22c7674..30e689a 100644
--- a/nix/modules/dhcp.nix
+++ b/nix/modules/dhcp.nix
@@ -92,6 +92,7 @@ in {
 
         subnet4 = [
           {
+            id = 1;
             subnet = cfg.subnet;
             pools = [
               {